Dental approaches in children with congenital heart disease treated under general anesthesia for oral rehabilitation

Background Children with congenital heart disease (CHD) are at high risk of contracting oral diseases. The aim of this study is to investigate dental procedures to prevent the risk of infective endocarditis in children with CHD. Material and Methods 146 patients aged 2-14 years, in need of prophylaxis before cardiovascular surgery and who had filled out anamnesis records, were considered. Dental caries in all the children with CHD was reported as the number of decayed, missing and filled teeth (DMFT). Results There was a significant strong positive relationship between the pre-oral rehabilitation DMF-T/dmf-t scores and the number of caries patients (r=0.95, p=0.01). There was no significant correlation between the pre-oral rehabilitation DMF-T/dmf-t scores and both tooth loss (r=0.14, p=0.09) and the number of restorations (r=0.11, p=0.17). In addition, there was no significant correlation between the post-oral rehabilitation DMF-T/dmf-t scores and the prevalence of dental caries. A positive and moderately strong correlation was found between the post-oral rehabilitation DMF-T/dmf-t scores and the number of missing teeth (r=0.56, p=0.01), while there was a positive and strong relationship between the post-treatment DMF-T/dmf-t scores and the number of fillings (r=0.62, p=0.01). Conclusions Extraction should be considered when providing oral rehabilitation, rather than endodontic and deep restorative treatments. Key words:Heart defects, congenital, dental caries, endocarditis.


Introduction
Congenital heart disease (CHD) is defined as an abnormality in the structure of the major vessels or heart and occurs in 8 out of 1000 live births worldwide (1).Shunting defects in CHD include atrial septal defects (ASDs), ventricular septal defects (VSDs), patent ductus arteriosus (PDA), and atrioventricular septal defects.Stenotic defects in CHD include aortic stenosis, pulmonary stenosis, and coarctation of the aorta.Complex CHD defects include transposition of the great arteries, tetralogy of Fallot (TOF), and hypoplastic left heart syndrome.These account for 90% of heart defects (2).Some drugs that are taken for this disease, especially those containing digoxin, are sucrose-based and associated with car-ported as the number of decayed, missing and filled teeth (DMF-T) (18).-Statistical analysis Descriptive statistics are presented with frequency, percentage, average and standard deviation values.A paired t-test was used to investigate the difference in DMFT levels according to the treatment time was used.A Mann-Whitney U test was applied due to the low number of disease groups in the examination, according to the type of heart disease.Pearson's test of correlation was applied to examine the relationships between age and the scores of the DMFT levels.In this study, p-values less than 0.05 were considered statistically significant.Analyses were made using the SPSS 22.0 (SPSS Inc., Chicago, Illinois) software.
ies.In addition, most heart drugs are frequently taken with sweetened food for motivational purposes (3,4).Due to ameloblasts being very sensitive to alterations in metabolic conditions, CHD could cause developmental enamel defects (5).Furthermore, it has been reported that primary dental enamel hypoplasia is more common in children with CHD than in healthy controls (6).Research has shown that children with CHD have poor oral hygiene.In addition, these children have a much higher prevalence of caries than do healthy children (7) and are more likely to contract oral diseases because of these problems (8).In children with CHD, odontogenic infections caused by caries or periodontal diseases such as periodontitis and gingivitis can cause infective endocarditis, a life-threatening medical condition (9,10).Specifically, one-third of these children are at higher systemic risk due to episodes of increased bacteremia (11).The oral health status of children with CHD could lead to other systemic complications (12).Therefore, untreated carious teeth should be avoided in children with CHD due to the risk of endocarditis caused by dental sepsis (13).Preventive measures for infective endocarditis should be taken as early as possible in these children (14,15).Consequently, the European Society of Cardiologists and the American Heart Association guidelines precisely described antibiotic prophylaxis to prevent the risk of endocarditis during dental procedures (10,13).Moreover, finding ways to prevent oral health problems has been emphasised in children with CHD (10,16,17).This highlights the importance of good oral health in these children (13).The aim of this study is to investigate dental procedures to prevent the risk of infective endocarditis (IE) in children with CHD.

Material and Methods
-Study design and participants Patients aged 2-14 years, in need of prophylaxis before cardiovascular surgery and who had filled out anamnesis records, were referred to Author's University Faculty of Dentistry, Department of Pedodontics.There they were evaluated for their oral status and need of treatment.This study was performed on 146 patients who came to this department for evaluation from January 2017 to December 2022.The specialist paediatrician of these patients performed systemic and physical examinations, and the patients' records were included in the study.Additionally, written informed consent was obtained from the parents of the participants.The study was conducted in collaboration with the Department of Pediatrics and Department of Paediatric Dentistry, Authors' University.The authors of this study are specialists at the Paediatric Dentistry of Authors' University.According to World Health Organization standards, dental caries from all the children with CHD was re- According to gender, there was no significant difference between the pre-and post-oral rehabilitation DMF-T/ dmf-t scores (p>0.05,Table 2).According to comorbidity disease, there was no significant difference between the pre-and post-oral rehabilitation DMF-T/dmf-t scores (p>0.05).There was also no significant difference in the DMF-T/dmf-t scores between patients with and without comorbidity disease (p>0.05).Furthermore, there were significant differences in the pre-treatment DMF-T/dmf-t scores among patients who did not use drugs (p=0.01,p<0.05).There was no significant difference in the post-oral rehabilitation DMF-T/dmf-t scores among patients who did not use drugs (p=0.39,p>0.05).Moreover, there were significant differences between the pre-treatment DMF-T/dmf-t scores between patients with and without cardiac surgery (p=0.02,p<0.05).In addition, there were significant differences in the post-oral rehabilitation DMF-T/dmf-t scores between patients with and without cardiac surgery (p=0.21,p>0.05).There were significant differences between the pre-and post-oral rehabilitation DMF-T/dmf-t scores of patients with ASDs, VSDs, mitral regurgitation, bicuspid aortic valves, aortic valve replacements and supravalvular aortic stenosis (with Williams syndrome, myocardial hypertrophy (p<0.05,Table 3).There were no significant differences between the pre-and post-oral rehabilitation DMF-T/dmf-t scores of patients who previously had acute rheumatic fevers (p=0.33).
Children  Table 4 shows a positive and strong correlation between the pre-oral rehabilitation DMF-T/dmf-t scores and the number of caries patients (r=0.95,p=0.01).Additionally, there was no significant relationship between the preoral rehabilitation DMF-T/dmf-t scores and the number of missing teeth (r=0.14, p=0.09).There was no significant relationship between the pre-oral rehabilitation DMF-T/dmf-t scores and the number of fillings (r=0.11,p=0.17).There was no significant relationship between the post-oral rehabilitation DMF-T/dmf-t scores and the number of caries patients.However, a positive and moderately strong correlation was found between the post-oral rehabilitation DMF-T/dmf-t scores and the number of missing teeth (r=0.56,p=0.01).In addition, there was a positive and strong relationship between the post-treatment DMF-T/dmf-t scores and the number of fillings (r=0.62,p=0.01).
centres with paediatric cardiologists and dentists could coordinate the treatment of oral health conditions and early disease awareness (20).Similarly, Naudi et al. stated that children with cardiac issues should be diagnosed in infancy through collaboration with medical colleagues (14).Koerdt et al. indicated that an interdisciplinary team containing paediatric cardiologists and paediatric dentists is required to rehabilitate children with CHD (20).
In the current study, the authors propose that children with CHD and whose systemic treatment and follow-up was performed by the paediatric cardiology department in the medical university should collaborate with paediatricians for their oral rehabilitation.Heart diseases may be associated with other diseases and syndromes (4).For example, Trisomy 21, 22q11, Noonan syndrome, Turner syndrome, and Williams syndrome account for approximately 21% of CHDs (22).Therefore, the authors decided not to exclude CHD patients with other associated diseases and syndromes, as in a study by Weidner et al. (8).
In this study, additional diseases were found in 35.2% of the children with CHD.Two studies found caries lesions in groups with cardiac disease (23,24).(11).In this study, the pre-oral rehabilitation DMF-T/dmf-t score of children with CHD was 10.94±4.14, and that after oral rehabilitation was 11.68±4.09(p=0.01).
The fact that children with CHD had additional diseases did not significantly change the dmft values.Heart medicines, such as sucrose-based digoxin, ACE-inhibitors, and diuretics, which reduce saliva secretion, promote caries in children with CHD (3,27).In the present study, most children with CHD had used heart medicine.These children showed higher DMF-T/dmf-t scores than those with CHD not using heart medicine during pre-oral rehabilitation (p=0.01).

Discussion
Children with CHD are at high risk of contracting oral diseases.Moreover, the oral diseases of these children are the etiological factors of IE (7).Furthermore, the result of oral-based sepsis could be fatal for these children (8).Therefore, this study investigated these children's oral health background and dental treatment approaches for the prevention of IE.Studies have shown that children with CHD do not present themselves until in the very advanced stage of caries; thus, most dental restorations can be performed under general anaesthesia (GA) due to the advanced dental disease (8,14,19).Therefore, children with CHD, who performed dental rehabilitation under GA, were included in this study.Nevertheless, GA could pose an increased risk to these children's health because it may induce an additional heart condition (6,20  examinations and preventive care (4).In the present study, operated children with CHD showed lower DMF-T/dmf-t scores compared to non-operated children before oral rehabilitation (p=0.02).George et al. examined the levels of salivary IL-6, a dental caries marker, in children (aged 3-6 years) with VSDs.They found a decrease in IL-6 levels after oral rehabilitation in these children (29).In addition, a study showed that heart diseases, such as ASDs and TOF, were associated with higher DMFT scores (4).In the current study, there were significant differences between the pre-and post-oral rehabilitation DMF-T/dmf-t scores of patients with ASDs, VSDs, mitral regurgitation, bicuspid aortic valves, aortic valve replacements and supravalvular aortic stenosis (with Williams syndrome, myocardial hypertrophy (p<0.05).
The Paediatric Congenital Heart Disease Standards and Specifications (PCHDSS), which was published in 2016, highlights the prophylaxis IE guidelines.In addition, the PCHDSS emphasises that it is a paediatric dentist cardiology team's responsibility to inform patients of the importance of good oral health.According to this guideline, dentists should inform patients with heart disease of the cardiology of the dental treatments and procedures used to provide oral rehabilitation, to prevent IE (7).For example, a primary tooth with two surfaces affected by caries should be extracted.Likewise, extraction should be considered for primary teeth with severe non-carious tooth surface loss.Similarly, carious teeth should undergo complete caries removal and be definitively restored or extracted (7).It is important to underpin the need for these children to have as little caries and as little pulpal involvement as possible.Therefore, minimally invasive interventions such as the Hall technique should be reconsidered in these children (30).In this study, before oral rehabilitation, the d value was higher at a high baseline DMF-T/dmf-t score in children.After oral rehabilitation, the m and f values were higher at a high DMF-T/dmf-t scores in children.Furthermore, extraction and restorative treatments were used to prevent IE in children with CHD.A limitation of the current study was the absence of a control group for follow-up.Another limitation of the study is that the dentition of the children was not grouped.Paediatric, paediatric cardiology and paediatric dentists should work collaboratively with children with congenital heart disease.Extraction should be considered when providing oral rehabilitation, rather than endodontic and deep restorative treatment.

Table 1 :
Demographic and medical findings of children.

Table 2 :
According to children's properties before/after dmf-t/DMF-T.

Table 3 :
According to children's heart diseases before/after dmf-t/DMF-T.
(28)man et al.concluded that heart operations could increase the prevalence of caries in children with CHD(28).Karhuma et al. found a trend whereby children who had undergone several heart operations had better caries statuses than others.They determined that the reason for was the number of oral